#define  _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<assert.h>
int my_strlen(char* s)
{
	char* start = s;
	char* end = s;
	assert(s);
	while (*end)
	{
		end++;
	}
	return end - start;
}


int main()
{
	char arr[] = "hello";
	int len = my_strlen(arr);
	printf("%d", len);
	return 0;
}
